| ORASIL 1979805 · TMA1130995 · design | VeraSIL Therapeutic Research Inc. | 1 Chemicals3 Cosmetics5 Pharmaceuticals | Registered | 2022 |
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| OraSIL 1979804 · TMA1124906 | VeraSIL Therapeutic Research Inc. | 1 Chemicals3 Cosmetics5 Pharmaceuticals | Registered | 2022 |
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| ORASEAL 0653393 · TMA405460 | ULTRADENT PRODUCTS, INC. | 10 Medical | Registered | 1992 |
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| ORACHOL 0434248 · TMA240549 | an individual | 5 Pharmaceuticals | Registered | 1980 |
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| ORSIL 1683285 · TMA925112 | Third Bay Ltd. | 40 Treatment | Registered | 2016 |
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| ORAJEL 1621714 · TMA932307 | Church & Dwight Co. Inc. | 21 Housewares | Registered | 2016 |
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| ORAJEL 1580169 · TMA847453 · design | Church & Dwight Co. Inc. | 3 Cosmetics5 Pharmaceuticals | Registered | 2013 |
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| ORAJEL 1580164 · TMA904891 · design | Church & Dwight Co. Inc. | 10 Medical | Registered | 2015 |
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| ORAJEL 1580163 · TMA904890 | Church & Dwight Co. Inc. | 10 Medical | Registered | 2015 |
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| ORAJEL 1441544 · TMA767645 | Church & Dwight Co. Inc. | 5 Pharmaceuticals | Registered | 2010 |
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| ORACAL 1179159 · TMA643798 | ORAFOL-KLEBETECHNIK GMBH | 6 Metal16 Paper17 Rubber+1 | Registered | 2005 |
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| ORAJEL 0886975 · TMA515547 | Church & Dwight Co. Inc. | 3 Cosmetics5 Pharmaceuticals | Registered | 1999 |
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| OROGOLD 1596330 · TMA872570 | Oro Gold Miami Inc. | 3 Cosmetics35 Advertising | Registered | 2014 |
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| ORACELL 1481187 · TMA850400 | LifeNet Health (a Virginia Corporation) | 5 Pharmaceuticals | Registered | 2013 |
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| ORISEAL 0244722 · TMA114712 | Mueller International, LLC (a Delaware corporation) | 6 Metal | Registered | 1959 |
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| ORÁCULO 2291522 | an individual | 33 Wine | Pending | 2023 |
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| ORACLE 2087751 · TMA1170134 | an individual | 11 Lighting | Registered | 2023 |
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| ORACLE 2041236 · TMA1166533 · design | Oracle International Corporation | 35 Advertising38 Telecommunications | Registered | 2023 |
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| ORACLE 2025293 · TMA1143582 | Oracle International Corporation | 41 Education | Registered | 2022 |
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| ORACLE 1951810 · TMA1224699 | Oracle International Corporation | 42 Science | Registered | 2024 |
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| ORSLOW 1938165 · TMA1131464 | BASE DENIM PRODUCTS INC. | 25 Clothing | Registered | 2022 |
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| OROGEL 1666145 · TMA968058 · design | an individual | 29 Meat30 Coffee31 Fresh | Registered | 2017 |
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| ORACLE 1620663 · TMA916950 | Breville Pty Limited | 7 Machines11 Lighting21 Housewares | Registered | 2015 |
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| ORACLE 1581886 · TMA910120 · design | Oracle International Corporation | 9 Electronics16 Paper35 Advertising+4 | Registered | 2015 |
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| ORAcollect 1529860 · TMA867198 | DNA Genotek Inc. | 1 Chemicals5 Pharmaceuticals9 Electronics+1 | Registered | 2013 |
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